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Buckling of stiffened
composite panels with stringer terminations
Enzo Cosentino and Paul Weaver |
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Vol. 4 (2009), No. 9, 1505–1533
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Abstract |
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A meshless approach is developed and used to predict buckling of discretely assembled multibay composite panels made from skin and stiffeners. The effect of eccentricity is included in the formulation. Particular emphasis is given to stringer run-outs within a stiffened panel, where abrupt eccentricity can trigger very large transverse displacements of the skin in front of the run-out tip. The model is obtained by combining von Karman’s formulation for moderately large deflections in plates with an extended Timoshenko approach for small initial perturbations. Solutions are calculated by means of a Rayleigh–Ritz approach in conjunction with a Galerkin technique. Hilbert’s orthogonal eigenfunctions are employed to obtain a generalized Fourier series expansion of the variables of interest. Limits of applicability, convergence of results and further potential exploitations are discussed. Numerical results obtained are compared with finite element analysis. |
Keywords
stringer terminations, buckling, composite panels
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Milestones
Received: 18 November 2008
Revised: 4 March 2009
Accepted: 26 August 2009
Published: 17 January 2010
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Authors |
| Enzo Cosentino | |
| Composite Stress Analysis, Composite
Structures Development Centre Airbus UK Ltd. Bristol BS34 7AR United Kingdom |
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| Paul Weaver | |
| Advanced Composite Centre for
Innovation and Science Department of Aerospace Engineering University of Bristol Queen’s Building 2.39 University Walk Bristol BS8 1TR United Kingdom |
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